In the automotive manufacturing industry, the demand for materials that combine strength, formability, and cost-efficiency is constant. JIS G3113 SAPH440 Automotive Steel is a hot-rolled steel plate specifically engineered to meet these rigorous demands, serving as a foundational material for critical structural components in vehicles. Its balanced properties make it a preferred choice for parts that require reliable performance under stress while allowing for efficient fabrication.
Key Specifications and Material Properties
SAPH440 is classified as a high-strength, hot-rolled steel for automobile structural use under the Japanese Industrial Standard (JIS) G3113. The grade designation indicates its minimum tensile strength of 440 MPa.
Chemical Composition of JIS G3113 SAPH440 Automotive Steel
The composition is optimized for weldability and formability:
Phosphorus (P) & Sulfur (S): Both are controlled to a maximum of 0.040%. This low level of impurities enhances the steel’s toughness and reduces the risk of cracking during welding and forming processes.
Mechanical Properties of JIS G3113 SAPH440 Automotive Steel
The steel offers a robust combination of strength and ductility essential for safety-critical parts:
- Tensile Strength (Min): 440 MPa
- Yield Strength (Min): Ranges from 275 MPa to 305 MPa, depending on plate thickness. This ensures good load-bearing capacity.
- Elongation: Excellent elongation values (29% minimum and higher, depending on thickness) guarantee superior formability for complex stamping operations.
- Bendability: It demonstrates good cold bending performance, capable of achieving a 180-degree bend, which is crucial during component fabrication.
Primary Applications in the Automotive Industry
SAPH440 steel is integral to manufacturing various structural and safety components, including:
- Chassis and Frame Members: Used in parts like side rails, cross members, and reinforcements where high strength is required.
- Wheels and Rims: Commonly specified for wheel discs and rim sections due to its formability and durability.
- Body Structural Parts: Applied in brackets, mounts, and other structural elements that contribute to vehicle rigidity and crashworthiness.
Available Processing and Additional Conditions
To meet specific project requirements, we supply SAPH440 with additional treatments and certifications:
- Processing Conditions: Available in As-Rolled (AR), Normalized (N), or via Thermo-Mechanical Control Process (TMCP) to achieve desired microstructures and properties.
- Enhanced Testing: Options include Ultrasonic Testing (UT) for internal quality, Charpy V-Notch Impact tests for toughness assessment, and Z-direction tests (Z15, Z25, Z35) to evaluate through-thickness ductility and resist lamellar tearing.
- Third-Party Inspection: Available upon request (e.g., SGS, BV).
Source High-Quality Automotive Steel with IBC (Tianjin)
IBC (Tianjin) Industrial Co., Ltd. supplies JIS G3113 SAPH440 and other automotive-grade steel plates from certified mills. We offer flexible order quantities with comprehensive processing options to meet your precise manufacturing specifications and project timelines.
Contact us today for detailed technical data, competitive pricing, and logistics information.